Re: [PATCH] fs: use kmalloc() to allocate fdmem if possible

[Jiri Slaby <jslaby@suse.cz>]

On 05/03/2010 11:13 AM, Eric Dumazet wrote:
> /*
>  * Warning: if size is not a power of two, kmalloc() might
>  * waste memory because of its requirements.
>  */
> void *kvmalloc(size_t size)
> {
> 	void *ptr = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);

This is kind of waste of high-order pages, isn't it? Wouldn't it be
better to have a watermark where we skip kmalloc completely?

> 
> 	if (ptr)
> 		return ptr;
> 	return vmalloc(size);
> }



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js
suse labs